Disk harrow



J. F. EEBKSEN.

ms NARROW.

. 7 APPLICATION FILED APR- ]4, 1920- 1,368,?06, Patented Feb; 15,1921

4 SHEETS-SHEET I.

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1. F. DERKSEN DISK HARROW. APPLICATION FILED APR. 14. I920.

Patented Feb. 15, 1921.

4y SHEETS-SHEET 2 Jacob FDer/ sm 1. F. DERKSEN.

DISK MARROW. APPLlCATION FILED APB. a4, I920.

Patented Feb. 15, 1921;

4 SHETS-SHEET 3- 3 upon #00 Jam!) fDer/ben 1 "a z n c 1 49/ QM Q\ N 6 w 1.1 F, DERKSEN. DISK HARROW.

APPLICATION FILED APR. 14, 1920.

Patented Feb. 15,1921

4 SHEETS-SHEET 4- eaves eeri JACOB F. DEBJKSEN, F CHINOOK, MONTANA.

DISK HARROW.

Specification of Letters Patent.

Patented Feb. 15, 1921.

Application filed April 14, 1920. Serial No. 373,801.

To aZZ whom it may concern:

Be it known that I, Jaoor, F. Dnnnsnn, a citizen of the United States, residing at Chinook, in the county of Elaine and State of Montana, have invented certain new and useful Improvements in Disk Harrows, of which the following is a specification.

This invention relates to disk harrows and one object of the invention is to provide means whereby the journal boxes which carry the axle or shaft of the gang of disks will be held in concentric relation to the axle or shaft so that angular wearing thereof will be prevented. Another object of the invention is to provide novel means for holding the gangs of harrow disks to the ground and also to provide novel means for adjusting the angular position of the gangs relative to the frame. and a still further object of the invention is to provide a novel truck or rolling support for the front end of the frame. Other objects will appear in the course of t 1e following description and the invention resides in certain novel features which will be particularly pointed out in the claims following the detailed description.

The invention is illustrated in the accompanying drawings, in which Figure 1 is a side elevation, with parts broken away, of a disk harrow embodying the improvements; 7

Fig. 2 is a plan view of one side of the harrow;

Fig. 3 is an enlarged section on line 33 of Fi 2 showing a portion of the mechanism for adjusting the angular position of the gangs;

Fig. 4: is an enlarged longitudinal section of one of the ournal boxes in which the harrow axle is mounted;

5 is a detail sectional elevation of a portion of the support for the front truck;

Fig- 6 is a longitudinal section showing the manner of mounting one of the truck wheels.

Fig. 7 is an enlarged detail section on the line 77 of Fig. 3;

Fig. 8 is an enlarged transverse section on the line 8-8 of Fig. 2;

Fig. 9 is a detail section on the line 9-9 of Fig. 8; j

Fig. 10 is a vertical section on. the line 101O of Fig. 2;

Fig. 11 is a perspective view of the parts shown in Fig. 5;

12 is a detail section taken transversely through the axle bearing.

Fig. 13 is a detail.

In carrying out my present invention, I employ a harrow frame consisting of parallel side bars 1 which may be joined integrally at their rear ends by a how 2 and have their front ends secured to a head block 3. A beam 4 is secured to the side bars 1 near the front ends thereof and this beam isprovided on its under side at its rear edge with a reinforcing truss 5. Bearings 6 are secured to the beam 4 and the truss 5 and project rearwardly beyond the rear edge thereof to support a worm shaft 7 for a purpose which will be presently set forth. The drivers seat 8 is carried by a standard 9 which may be secured in any convenient or preferred manner to the rear ends of the side bars so that the driver may conveniently reach the operating instrumentalities. The head block 3 projects forwardly beyond the side bars 1 and is formed into a vertically disposed sleeve 10 which depends below the side bars and is reinforced by a web 11 connecting the lower side of the head block and the rear side of the sleeve as will be readily understood on reference to Fig. 1. The sleeve 10 receives a spindle 12 which has its lower end bent rearwardly at a right angle, as shown at 13 in Fig. 5, to carry the axle and ground wheels of the front truck. A vertically disposed clevis frame 1% has its upper and lower ends fitted around and pinned to the spindle 12 immediately above and below the sleeve 10 and the lower arm of this frame is carried rearwardly beyond the spindle and provided with diverging lateral lugs or projections 15 which constitute stops to limit the vertical rocking movement of the truck. A bolster 16 is fitted upon the rearwardly extending portion 13 of the spindle and this bolster has its upper surface 17 arranged close to and below the stops 15, as clearly shown in Figs. 5 and 11, so that when the truck rocks vertically in passing over uneven ground, one or the other end of the bolster will be brought against the adjacent stop 15 and the rocking of the truck will be limited so that chafing of the necks of the draft animals will be avoided and the lifting v of the gangs of disks or blades from the soil will be prevented. The upper portion of the bolster is in the form of a forwardly and rearwardly extending sleeve 18 fitting upon the terminal 13 of the spindle and depending from said forwardly and rearwardly extending sleeve is a transverse sleeve 19 through which the axle 20 is inserted. The axle may be either a rotary axle havingthe ground wheels fast thereon or a stationary axle upon which the ground wheels may revolve and if it be desired to have the axle stationary, a set screw 21 mounted in the sleeve 19 will be turned home, as indicated in Fig. 5. It is desirable to apply lubricant to the terminal 13 and, to prevent loss of the lubricant, I fit a cap 22 upon the terminal immediately adjacent the main portion of the spindle 12 and this cap is secured in place by a set screw 23. As clearly shown, the cap-fits over the front end of the sleeve 18 and serves,

as a bearing therefor inwhich it may rock. A cap nut 2 1- is fitted over the rear endof the sleeve 18. and is threaded onto the same so that it will rotate therewitlnthe interior of this cap nut serving as a chamber to hold the lubricant as will be readily understood. A ground wheel 25 is fitted upon each end of the axle 20 which projects some little distance laterally beyond' the side bars 1, as clearly shown in Fig. 2, so that a firm support for the front end of the frame is provided and the strain upon the draft animals is materially lessened. A clevis 26 is ad justably secured upon the elevis frame 14 and the draft devices are attached to said clevis in the usual manner. I prefer to employ a stationary axle, in which event the ground wheels 25 will be mounted upon the axle in a mannersimilar to the mounting of the bolster 16, upon the terminal 13 of the spindle 12. This mounting is shown in Fig. 6 in which 27 is the inner cap secured upon the axle by a set screw 28 and the hub 29 of the ground wheel has its inner end fitted rotatably within the said cap. Upon the outer end of the hub is secured a cap nut 30 which may contain lubricant to be taken up by the hub as it rotates upon the axle.

Engaged upon the worm 7, between the side bar 1 and the end of the beam his a nut or collar 31 having its front end notched to engage the rear edge of the beam -il antv to bear against the rear edge of the truss 5 so that rotation of the collar or nut about the worm will be prevented and the collar will be caused. to travel smoothly toward the end of the beam when the worm is rotated. Therear end of the collar is forked, as shown at 32, and within the, said fork is pivotally secured the front end of a V-, shaped name 33 which carries the gang of harrow disks. A. transverse guiding and sustaining bar or arch 3 1 is. secured to the side bars 1 and the ends of this bar are formed into eyes 35 through which the outer sides of the V-shaped frames 33 pass, it being understood that the frames 33 are duplicated at the two sides of the machine and only one frame is shown merely to permit the constru-ftion tohe more clearly 1llus it will be, understood, as shown the collar so that the angular position t in Fig. 2, that the threads of the worm 7 are oppositely disposed at opposite sides'of side bars 1. The arched'bar 34 is connected with the ends of the beam 42 by braces 36 secured at their front ends to the beam and at their rear ends to the arched bar, as clearly shown in Figs. 1 and 2. The

arched bar will, Consequently be fixed in position and, therefore, as the collar 31 shiftedtoward or from the endof beam l.

the eye 35 will serve as a guide and fulcrum to cause the V-shaped frame 33 to .swi g about its pivotal connection with the said gang at the rear end 'of'said frame will adjusted as desired. (lollapse or spreadii of the frame is prevented by a brace disposed between its sides and secured ri t thereto, as clearly shown. The sides of the frame have their extremities bent laterally, as. shown most clearly at 38 in ii and this lateral between the flanges'-ZS of the journal box 40 andis secured to and between said flu? by a plurality of bolts so that relative moi ment of these parts cannot occur. The said ournal box consists of mating half sieevesas shown clearly in Fig. 12,.and the bolts which secure the tongues or extensions 38 in place.

also secure the front sidesof the sleevos together. On their rear edges, the half sl are provided with flanges. through whit a suitable bolt is passed to secure them together, :lt willthus be readily seen that the journal bones are easily secured aro axle and will be held concentric the and with their side walls parallel with the sides of the axle in all posit-ions of the Spacing sleeves 42 are fitted in the endsof the journalboxes and these .;paci2ig Sales. are separated at their inner ends by a disk or washer 43, the axle passing through the said washer or dish and j the sleeves, as clearly shown in Fig. 4-. The spacing sl ve 42 are provided at their outer'extr ities with annular enlargements or should!- 'Which are adapted to bear against the adjacent harrow disks. and to obtain a-elose it 7 even engagement of the enlargements with the disksthe face of one. enlargementiis coin the ends of the journal boxes'aud bearing against cups 49 which are fitted in the s chambers or and have an angular engage-mimethe: 1* so that theycannot rotate out free to move longitudinally under excessive st projection. or tongue 3-55 tits lie.

recesses in thev'jo uaal hows The harrow disks may be of the usual form and are held by and between the adjacent ends of spacing sleeves as will be readily understood, a pin or lug 51 being shown on one sleeve in Fig. 2 passing through an opening provided therefor in ends are of the same formation as the ends.

of the sleeves 42, the latter sleeves being employed only within the bearing boxes 40 as will be readily understood.

Coiiperating with the several harrow disks are scrapers 53 which correspond in number to the disks so that there is a scraper bearing against each diskto remove therefrom the dirt which may tendto adhere thereto and clog the operation of the disks. These scrapers are carried by a frame 54 disposed above the gang of disks, each scraper being secured at its upper end to a rock shaft 55 mounted in bearings 56 on the rear side of the frame and yieldably held in such a position that the scrapers will bear against the disks by a spring 57 coiled around the shaft and having one end attached to an adjacent bearing 56 and its opposite end attached to the upper end of a scraper. The frame 54 is supported by arms 58 secured to and rising from the frame 33 and cooperating arms 59 secured to and rising from lugs 60 on the journal boxes 40. Lubricating cups 61 are secured upon the farme 54 and spouts 62 lead from said cups to and into the lugs 60 on the journal boxes 40 to communicate with passages 63 formed in the journalboxes and leading to the sleeves 42 or the axle so that the axle will be properly lubricated without loss of the lubricant. At an intermediate point of its length, a rocking arm or lever 64 is secured to the rock shaft 55 and this lever or rocking arm has its front end turned up wardly in advance of the frame and formed into a pedal 65. A keeper 66 rises from the lever or rocking arm 64 and has its upper l V end suitably shaped to fit over the front side of the frame 54, as clearly shown in Fig. 8. A. latching hook 67 is pivoted upon the frame 54, as shown clearly in Figs. 8 and 9, so that if the pedal be depressed to throw the scrapers 53 rearwardly, the said latching hook 67 may be engaged over the upper edge of the keeper 66 and the scrapers will then be held in their rear position against the tension of the spring 57 as will be readily understood.

In order to rotate the worm 7 and thereby set the gangs of harrow disks in a desired angular position. I employ the mechanism shown in Figs. 1, 2, 3-and 7 which 1s mounted upon and between the side bars 1 of the mainframe and may be conveniently manipulated by the driver upon the seat 8. This mechanism comprises a pinion 68 secured or formed upon the worm shaft 7 at the center thereof and a spur gear 69 which.

is carried by a shaft 7 0 mounted in bearings 71 upon the side bars 1. The spur gear 69 obviously meshes directly with the pinion 68 so that if the gear be rotated the worm shaft will be likewise rotated and the desired movement imparted to the collars 3.. To manipulate the gear 69, I form on one side thereof an annular flange or rib 72 which is provided at intervals with transverse openings or sockets 7 3 to be engaged by a pin 74 and thereby lock the operating lever 7 5 to the gear. When the lever is locked to the gear, any movement of the lever will, of

course, be transmitted directly to the gear and if the pin be withdrawn the lever can be returned to its initial position without actuating the gear. A guiding lug 76 is provided on the side of the lever to fit over the flange 72 and thereby prevent the lever moving laterally from the gear and assuming an inoperative position. To manipulate the locking pin 74, I provide an angle lever 77 which is fulcrumed at its angle upon the side of the hand lever and has its lower extremity pivoted to the outer end of the pin 74, as clearly shown in Fig. 7, while the extremity of the upperarm of the angle lever is pivoted to the lower end of a link 78 hav ing its upper end attached to a handle 79 pivoted upon the lever 75 so that the pin may be withdrawn from or engaged in a socket 73 at will. A spring 80 is coiled around the lower end of the link 78 between the angle lever 77 and an abutment 81 on the hand lever 75 and by its expansion tends normally to hold the pin 74 in engagement with a socket 7 3. It will be readily understood that by swinging the lever 75 about the shaft 7 0 while the pin 74 is in a socket 73, the gear 69 will be actuated and movement imparted therefrom to the worm shaft 7 through the pinion 68. The handle 79 is then manipulated to withdraw the pin 74 from the socket 73 and the lever 75 swung in the opposite direction until it is in position to permit the pin 74 to engage another socket 73, after which the former operation is repeated as will be readily understood. When the harrow gang has been brought into the desired angular position, it may be locked in that position by the action of a locking pin 82 which is slidably mounted upon the edge of the adjustinglever75 and attached at its upper end to a handle 83 on said lever. The lower portion of the pin 82 plays through a guide 84 on the lever 75 and a spring 85 is coiled around the pin between abutments 86 and 87 upon the lever 75 and the pin respectively so that the pin will normally be projected to engage the proper opening 88 in a lockingrib 89 which is formed upon one bearingrfi in which the shaft 70. is journaled. he bearings are secured rigidly to the respective side bars 1 and consequently the rib or flange 89 is immovable so that when the pin82 is in engagement with one of the openings 88 the adjusting lever 75 will be to be engage against the lower held against vibration and the gangs will be locked in their set position. As shown most clearly in Fig. 3, the openings 88 are tangential rather than radial to the shaft so that each opening will be in alinement with the locking )in 82 when it, respectively, is d by said pin. 7 The pivotal'connection of the frame 33 with the collar or nut 31 is of such form versely in and is guided by the vertically slotted frames 91 secured to and depending from the side bars 1 of the main frame at the rear end thereof. The presser bar 90 is carried by the lower end of a stem 92 which, at its upper end, is engaged in an adjusting sleeve 93 equipped at its upper extremity with a hand wheel 94. This sleeve 93 is externally threaded and rotatably mounted in a bearing or nut 95 formed on a yoke 96 secured to and rising from the side bars 1. 'Slidably fitted upon the lower portion of the stem 92 is'a sleeve 97 having a yoke 98 at its lower end which has notched extremities to engage the tapered upper edge 99 of the presser bar'90 as will be readily understood. A spring 100 is coiled around the stem 92 and bears at its lower end upon the upper its upper end end of the sleeve 97 and at end of the sleeve 93. The

tension of the spring 100 is obviously ex- 6&- very simple andefiicient erted upon the upper end of the sleeve 97 and through said sleeve nd its fork 98 to hold the presser bar 90 in its lowest position so that the frame 83 upon which said presser bar rests will be held to its work. Should a large obstruction be encountered, however, the spring 100 will yield and the sleeve 97 will rise and permit the presser bar 90 to move upwardly in unison therewith so that the gang of disks will be permitted to ride over the obstruction without injury. The tension of the spring 100'is' obviously regulated by manipulating the hand wheel 94 and any desired pressure'may, therefore, be applied to the presser bar 90.

F mm the foregoing description, taken in connection with the accompanying drawings, it will be seen that I have provided a To prevent the gang "which carry the axle vill frame, and a outer side of said supplemental frame where-' barrow which may be drawn over a field by draft animals With out excessive strain being placed upon the animals. The truck supporting the front end'of the main frame will relieve the draft animals of all supporting strain so that they causing the harrow gangs to withdraw from the soil and the rocking movement of the truck willbe limited so that it 'cannot 'upset the harrow or divert the gangs from their proper lines of travel. The gangs maybe easily setto run at any desired angle to the line of draft and will be firmly held in that position and 'wear upon the axle will be minimized inasmuch as the journal boxes be rigidly held in the planeof the axle by the manner in which the journal boxes are secured to the carrying frames, movement of the journal boxes relat tively prevented and the boXesbe-ing conse-. quently their life.

ive to'said frames being posi held true to the axle. throughout V Having thus described the invention, what is claimed as new is: V V

1. In a harrow, the combination of a main frame, a carrylng frame consisting of rearwardly diverging side members, a gang ofground-treating members carried by the rear end of said frame, a connection between the vfront'end of the carryingframe and the main frame, said connection'being adjust able laterally upon the main frame, and an immovable guide engaging and supporting member of the car the outer diverging side rying frame whereby as the front end of said frame is shifted laterally the rear end thereof will be caused to about its front end. i V

2. In a harrow, thecombination of a main frame, a laterally'movable slide mounted on the main frame, a supplemental frame hav ing a pivotal connection at its front end swing pivotally with said slide, a gang of ground-treating 7 members carried by the rear end of said statlonary support for the by lateral movement of the slide will effect angular adjustment of the supplemental frame. 7

3. In a harrow, the combinationof'a main frame, a supplemental frame, a gang off for. supporting the supplemental thereon, means on the main frame for rotating said shaft and locking the same in a set position, a transverse bar secured rigidly to the main frame and provided at its end with an eye, a collar fitted upon the worm shaft, a supplemental frame having its front end pivotally connected with said collar and having its outer side passing through the eye on the said transverse bar, and a gang of ground-treating members carried by the rear end of said frame.

5. In a harrow, the combination of a main frame, a worm shaft mounted transversely upon the main frame, a collar fitted upon said shaft and slidably engaging the adj acent portion of the main frame, a supplemental frame connected with said collar, a gang of ground-treating members carried by said supplemental frame, a gear mounted upon the main frame and operatively engaging the Worm shaft, an oscillatory lever mounted concentric with said gear, means for locking the lever to the gear whereby to actuate the gear, and means for locking the lever to the frame to hold the gear and the worm shaft in a set position.

6. In a harrow, the combination of a main frame, a transverse adjusting shaft mounted thereon, a supplemental frame operatively connected with said shaft whereby to be shifted laterally with respect to the main frame, a gang of ground-treating members carried by said supplemental frame, a gear mounted in the main frame and operatively engaging the adjusting shaft and provided in one side with a plurality of sockets, a lever mounted concentric with the gear, a pin carried by the lever and adapted to engage any one of the sockets in the gear, means on the lever for setting said pin, and means for locking the lever to the frame.

7. In a harrow, the combination of a main frame, an adjusting shaft mounted transversely thereon, a supplemental frame operatively connected with said shaft whereby to be adjusted laterally with respect to the main frame, a gang of ground-treating members carried by the supplemental frame, a gear on the main frame operatively engaging the said adjusting shaft, a locking rib on the main frame concentric with the said gear and provided with a plurality of sockets, a lever mounted concentric with the gear and said rib, means for locking the lever to the gear, and a locking pin carried by the lever and adapted to engage any one of the sockets in the locking rib.

In testimony whereof I affix my signature.

JACOB r. DERKSEN. a 3. 

